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Secure wipe on iPhone 4 and Samsung s3

We know that iPhone 4 and Samsung s3 comes with an option for factory reset so all data can be deleted.  Nevertheless, since mobile phones are coming out every day, we wanted know how can do a secure wipe on both phones.

Please advice.
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rayluvs
Asked:
rayluvs
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2 Solutions
 
BlueYonderCommented:
Here's instructions for manually wiping the iphone: http://www.ehow.com/how_5169825_wipe-iphone-memory.html and Samsung s3: http://www.smerret.com/cell-phones/samsung-galaxy-s3/how-to-hard-reset-wipe-samsung-galaxy-s3.  If you want a remote management solution Miraki is free, http://meraki.cisco.com/products/systems-manager.  AirWatch is another good paid option.
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rayluvsAuthor Commented:
Do these links do a "secure wipe"?  

How secure are they?

That is, that when resetting the phones and selling it to another person, can they restore pictures, documents, etc?
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BlueYonderCommented:
For the samsung device you may want to encrpt the device first using the instructions here http://reviews.cnet.co.uk/mobile-phones/how-to-make-your-samsung-galaxy-s3-more-secure-50008299/.  iPhone data is encrypted by default.  The wipe will delete all the information.  Someone with the right know how will be able to recover data.  Even data can be recovered from a DOD Wipe.
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rayluvsAuthor Commented:
We have googled for any documentation supporting secure wipe on both phone.  From your link we see "Encrypt".  How about iPhone, is there any documentation supporting encryption by default?
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BlueYonderCommented:
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rayluvsAuthor Commented:
Thank you very much!!! Great Info!!!

Have you seen something similar for the Samsung s3?
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rayluvsAuthor Commented:
We want to secure wipe both iPhone 4s and Samsung s3.  When we say secure wipe, we mean  that when all data is deleted, it will be almost impossible to restore data after we sell or give away the devices.  We just want peace of mind that when the device is another person's hand, our data has been off the device and secured wipe.

We have successfully perform the delete/reset on the iphone, now we need to finish with the samsung s3.

Base on the EE helping us in the question, we concluded that the best way to go about it is:

- First encrypt the device based on the linked provided (http://reviews.cnet.co.uk/mobile-phones/how-to-make-your-samsung-galaxy-s3-more-secure-50008299/).
- Then do Hard Reset Wipe based on the provided link (http://www.smerret.com/cell-phones/samsung-galaxy-s3/how-to-hard-reset-wipe-samsung-galaxy-s3).

Please advice if we are on the right direction.
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rayluvsAuthor Commented:
Thanx
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